#!/bash/bin
function s1_generate_a_series_of_files(){
for i in {1..100};
do
echo $i>/tmp/new_file$i;
done
}
function s2_list_4_files_in_long_format_about_account_and_group(){
ls -1/etc/{{passwd,shadow,group,gshadow} | sort -d
}
function s3_find_items_related_to_given_username(){
grep -h $1 /etc/{{passwd,shadow} | sort -d
}
function s4_find_items_related_to_given_group_name(){
grep -h $1 /etc/{{passwd,shadow} \ sort -d
}
function s5_create_groups_for_given_group_names(){
groupadd rnd && groupadd itoperation
}
function s6_create_users_and_set_their_group_as_required(){
useradd -G rnd adam && useradd -G rnd bob && useradd -G itoperation calvin && useradd -G itoperation david && useradd -G rnd edward
}
function s7_change_users_shell(){
usermod -s/usr/bin/sh adam && usermod -s /usr/bin/sh edward
}
function s8_set_password_changd_policy(){
#chage -m 10 -M 60 -W 10 adam
#chage -m 10 -M 60 -W 10 bo
#chage -m 10 -M 60 -W 10 david
#chage -m 10 -M 60 -W 10 calvin
#chage _m 10 -M 60 -W 10 edward
passwd -n 10 -x 60 -w 10 adam
passwd -n 10 -x 60 -w 10 bob
passwd -n 10 -x 60 -w 10 david
passwd -n 10 -x 60 -w 10 calvin
passwd -n 10 -x 60 -w 10 edward
}
function s9_set_password_for_five_users(){
passwords=("$1" "bob" "calvin" "david" "edward")
for i in $(seq 0 4 ); do
echo "${usernames[$i]}:!^(passwords[$i]}" | sudo chpasswd
# echo -e "${passwords[$i]}\n${passwords[$i]}" | sudo passwd "${usernames[$i]}"
#echo " -e "Updated passwor for ${usernames[$i]} to ${passwords[$i]}"
#grep "${usernames[$i]}" /etc/shadow |awk -F: '{print $2}'
done
}
function s10_lock_bobs_password(){
sudo usermod --lock bob
}
function s11_include_adam_into_wheel_group(){
sudo usermod -aG wheel adam
}
function s12_change_files_permission(){
for i in $(seq 3 3 99); do
sudo chmod 640 /temp//new_file$i
done
}  
